What is DeepSeek V3.1-Terminus?

DeepSeek V3.1-Terminus is a large language model from DeepSeek, released on September 22, 2025. It accepts text input.

When was DeepSeek V3.1-Terminus released?

DeepSeek released DeepSeek V3.1-Terminus on September 22, 2025.

What is DeepSeek V3.1-Terminus's context window?

DeepSeek V3.1-Terminus has a 128K-token context window.

How does DeepSeek V3.1-Terminus score on benchmarks?

DeepSeek V3.1-Terminus has 12 cited benchmark scores, including LMArena Elo 1417.2 Elo, Aider-Polyglot 76.1% and BrowseComp 38.5%. Each score links to its source.

DeepSeek V3.1-Terminus

DeepSeek·Operational·Released 2025-09-22text

Context128k

Max output-

Input / 1M-

Output / 1M-

Cached in-

Benchmarks12

Benchmarks

Cited public sources · rank is exact-benchmark, apples-to-apples

LMArena Elo

#88/1411417.2 ↗

Aider-Polyglot

#1/876.1% ↗

BrowseComp

#21/2338.5% ↗

BrowseComp-zh

#3/345% ↗

GPQA-Diamond

#4/880.7% ↗

Humanity's Last Exam (no tools)

#21/3421.7% ↗

LiveCodeBench

#2/1174.9% ↗

MMLU-Pro

#10/4985% ↗

SimpleQA (agentic tool use)

#2/296.8% ↗

SWE Verified

#1/268.4% ↗

SWE-bench Multilingual

#12/1557.8% ↗

Terminal-bench

#3/336.7% ↗

Compare

vs Gemini 4 Argon vs GPT-6.1 Sol vs Claude Sonnet 5.5 vs Muse Spark 1.3 vs GPT-6 Sol vs GPT-6 Luna vs Claude Opus 5.5 vs GPT-6 Astra

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DeepSeek V3.1-Terminus FAQ

What is DeepSeek V3.1-Terminus?: DeepSeek V3.1-Terminus is a large language model from DeepSeek, released on September 22, 2025. It accepts text input.
When was DeepSeek V3.1-Terminus released?: DeepSeek released DeepSeek V3.1-Terminus on September 22, 2025.
What is DeepSeek V3.1-Terminus's context window?: DeepSeek V3.1-Terminus has a 128K-token context window.
How does DeepSeek V3.1-Terminus score on benchmarks?: DeepSeek V3.1-Terminus has 12 cited benchmark scores, including LMArena Elo 1417.2 Elo, Aider-Polyglot 76.1% and BrowseComp 38.5%. Each score links to its source.

Access DeepSeek V3.1-Terminus and every other model through one endpoint with automatic failover: Respan gateway.